JP4966714B2 - Inverted quantitative injection type aerosol valve and aerosol product using the same - Google Patents

Description

The present invention relates to quantitative injection type aerosol valve and an aerosol products using the same for inverted.

Japanese Patent No. 3339900 Utility Model Registration No. 2606515

  2. Description of the Related Art A quantitative injection type aerosol container that injects a certain amount of contents with a single injection operation is known. Such an aerosol container is used for contents such as pharmaceuticals and cosmetics whose use amount is determined.

  Patent Document 1 discloses such a quantitative injection type aerosol container, which uses a compressed gas as a propellant and has a flexible quantitative chamber provided in the housing of the aerosol valve. ing. The metering-injection type aerosol valve includes a housing, a flexible tank disposed in the housing, a guide bush disposed in the tank, and a stem disposed movably up and down in the guide bush. It has. A space between the guide bush and the tank is a quantitative chamber. In addition, a communication hole for introducing pressure (compressed gas) in the container is formed in the side portion of the housing, and a hole through which the contents are passed is formed in the side portion of the guide bush. Furthermore, this aerosol valve is provided with a dip tube at the lower end of the housing.

  The aerosol valve of Patent Document 1 is used in an upright state. When the stem is raised, the contents are introduced into the housing through the dip tube. Then, by lowering the stem, the stem hole is opened, and at the same time, the lower end of the stem seals the tank. At this time, since the inside of the tank communicates with the atmosphere, a difference occurs between the internal pressure of the tank and the internal pressure of the aerosol container. As a result, the tank is deformed by being pressed by the compressed gas through the communication hole. And the content for the volume which deform | transformed the fixed_quantity | quantitative_assay chamber is injected from the injection hole of the injection member with which a stem is mounted | worn through a hole.

  Patent Document 2 discloses a fixed-quantity injection type aerosol container in which a fixed-quantity chamber is provided outside the aerosol valve housing. This is provided with a metering chamber surrounded by a flexible rubber valve body outside the aerosol valve. In the stationary state, the fixed-quantity chamber and the inner bag communicate with each other. In this state, by lowering the stem, the stem shuts off the metering chamber and the inner bag. As a result, there is a difference between the internal pressure of the valve and the metering chamber and the inner pressure of the inner bag, the rubber valve body is pressed against the contents and deformed, and the contents are injected by the deformation amount of the metering chamber. is there.

  However, the aerosol valve of Patent Document 1 cannot be used in an inverted state. On the other hand, although the aerosol valve of patent document 2 can be used in an inverted state, it is used for a double aerosol container in which the contents are hermetically filled in the inner bag, which increases the cost.

An object of the present invention is to provide an inverted quantitative injection type aerosol product in which an aerosol composition composed of a compressed gas and contents (stock solution) is filled in an aerosol container, and a quantitative injection type aerosol valve used therein. .

The inverted fixed quantity injection type aerosol valve of the present invention is inserted into the opening of a pressure-resistant container filled with compressed gas as a propellant and is fixed, and the cylindrical housing having a lower bottom is inserted into the housing. A cylindrical tank having a lower bottom, which is fixed and fixed, and a cylindrical guide bush having a lower bottom which is inserted and fixed in the tank, and is moved up and down around the center of the guide bush. A stem having a stem hole that is freely inserted, a spring that biases the stem upward, and a ring-shaped stem rubber that blocks communication between the stem hole and the inside of the housing, the tank and the guide bush Is a metering-injection type aerosol valve in which a space formed between the two is a metering chamber, and the housing is formed at the center of the bottom so as to support the introduction hole formed on the side surface and the tank. An inner cylinder formed, and a notch formed at a part of the upper end of the inner cylinder, and the tank communicates with the inside and outside of the tank, and the bottom end of the stem is fitted to seal the inside of the tank. A seal hole formed at the center of the bottom, and a seal cylinder formed at the periphery of the seal hole so as to seal the metering chamber while supporting the guide bush. It has a feature that it has a stem moving hole formed at the center of the bottom so that it can be moved up and down, and a communication hole that communicates the inside of the guide bush and the metering part.

In such an aerosol valve, the housing has a first step portion formed on an inner surface upper portion and a second step portion formed on the first step portion, and the tank has a first step portion. A flange portion formed at the upper end so as to engage with the first step portion, and the guide bush is formed at the upper end so as to engage with the first step portion via the flange portion of the tank. The stem rubber engages with the second step portion and is configured to press the flange portion of the guide bush, so that the stem rubber is pressed against the second step portion, And what is provided with the cap for valves attached to a pressure-resistant container so that a housing may be covered is preferable.
Further, it is preferable that when the lower end of the stem is fitted into the seal hole of the tank, the peripheral edge of the seal hole seals the notch portion of the housing.

An inverted quantitative injection type aerosol product of the present invention comprises a pressure-resistant container, a fixed-quantity injection type aerosol valve of the present invention attached to an opening of the pressure-resistant container, a stock solution filled in the pressure resistant container, and a propellant. It consists of a composition.

The inverted quantitative injection type aerosol valve according to the present invention is configured such that the tank is inserted and fixed in a housing, and the housing is formed at the center of the bottom so as to support the introduction hole formed on a side surface and the tank. Since the inner cylinder and the notch formed in a part of the upper end of the inner cylinder are provided, the contents can be introduced into the tank from between the housing and the tank in an inverted state.
In addition, the tank communicates the inside and outside of the tank, and seals the metering chamber while supporting the guide bush and the seal hole formed at the center of the bottom so as to fit the bottom end of the stem and seal the inside of the tank. Since the seal cylinder is formed at the periphery of the seal hole, the seal hole is closed by lowering the stem, and the tank including the metering chamber is a space (pressing space) between the housing and the tank. Sealed against. At this time, since the inside of the tank communicates with the atmosphere and the pressing space communicates with the inside of the container, an internal pressure difference is generated, and the flexible tank is compressed and deformed by being pressed by the contents of the pressing space. . As a result, the contents in the metering chamber are jetted, and then the jetting stops.
Further, the guide bush has a stem moving hole formed at the center of the bottom so as to allow the stem to move up and down, and a communication hole communicating the inside of the guide bush with the metering chamber. The contents are ejected from the stem through the guide bush.

  In such an aerosol valve, the housing has a first step formed on the upper surface of the inner surface and a second step formed on the first step, and the tank has a first step. A flange portion formed at the upper end so as to engage with the portion, and the guide bush has a flange portion formed at the upper end so as to engage with the first step portion via the flange portion of the tank. The stem rubber engages with the second step portion and is configured to press the flange portion of the guide bush, so as to press the stem rubber against the second step portion, and When the cap for the valve attached to the pressure vessel is provided so as to cover the housing, the tank and the guide bush are firmly fixed to the housing, and the tank is stably deformed. Therefore, it is possible to stably eject the same content.

  Further, when the lower end of the stem is fitted into the seal hole of the tank, when the peripheral edge of the seal hole seals the notch portion of the housing, the passage into the metering chamber can be double sealed, and the quantitative property is high.

  An inverted quantitative injection type aerosol product of the present invention comprises a pressure-resistant container, a fixed-quantity injection type aerosol valve of the present invention attached to an opening of the pressure-resistant container, a stock solution filled in the pressure resistant container, and a propellant. Since it consists of a composition and the said propellant is compressed gas, by using it in an inverted state, only compressed solution can be injected, leaving compressed gas.

Next, the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of an inverted quantitative injection type aerosol product according to the present invention. FIGS. 2a, 2b and 2c are longitudinal sectional views showing a housing, a tank and a guide bush of the aerosol product of FIG. 3 is an operational state diagram when the stem of the aerosol product of FIG. 1 is lowered, FIG. 4 is a longitudinal sectional view showing an embodiment of an injector containing the aerosol product of the present invention, and FIG. It is an operation state figure which shows the usage method of the injector of FIG.

  The aerosol product 10 in FIG. 1 includes a pressure-resistant container 11, a quantitative injection type aerosol valve (hereinafter referred to as a valve) 12 attached to an opening of the pressure-resistant container, and an aerosol composition A filled in the pressure-resistant container. The pressure vessel 11 is a conventionally known one, and includes a bottom portion, a trunk portion, a shoulder portion, and a neck portion. The pressure vessel 11 is provided with an annular engaging recess 11a at the neck portion, and is formed from a metal plate such as aluminum. However, you may shape | mold from a synthetic resin or a pressure | voltage resistant glass. The aerosol composition A is composed of a stock solution A1 and a propellant A2 made of compressed gas. The aerosol product 10 is used by being inverted from the state shown in FIG.

  The valve 12 is inserted into the opening of the pressure vessel 11 and locked therein, the flexible deformable tank 17 locked in the housing, and locked in the tank. A guide bush 18, a stem 19 inserted into the guide bush movably up and down, a spring 20 that urges the stem upward, a stem rubber 21 locked to the upper end of the housing, and a stem rubber It comprises a housing 16, a tank 17, and a valve cap 22 for fixing the guide bush 18 so as to cover the housing. The valve 12 has a metering chamber 23 composed of a space formed by a tank 17 and a guide bush 18.

  As shown in FIG. 2a, the housing 16 has a cylindrical shape having a lower end closed by a lower bottom 25 and an annular flange portion 26 at the upper end, and an introduction hole 27 is formed on a side surface. The introduction hole 27 transmits the pressure of the compressed gas A2 in the pressure vessel 11 to the tank 17 via the stock solution A1, and introduces the stock solution into the metering chamber. The introduction hole 27 is preferably provided on the upper side as much as possible. On the other hand, an inner cylinder 28 that supports the tank 17 is formed at the center of the inner surface of the bottom 25 of the housing 16, and a first step portion 29 that locks the tank and the guide bush and a stem rubber that locks the stem rubber are formed on the upper side. A two-stage part 30 is formed. Further, a cutout portion 31 is formed at a part of the upper end of the inner cylinder 28. The lower bottom of the inner cylinder 28 includes a protruding portion 32 that protrudes downward from the lower bottom 25 in order to receive the lower end of the stem 19.

  The housing 16 is locked to the pressure vessel 11 with the flange portion 26 engaging with the opening of the pressure vessel 11 via the gasket 33 (see FIG. 1). The housing 16 maintains the components of the valve in a predetermined form, and has an effect of guiding the contents into the tank when in an inverted state.

  As shown in FIG. 2b, the tank 17 has a cylindrical shape having a lower bottom 35 at the lower end and an annular flange portion 36 at the upper end. A seal hole 37 is formed to seal the inside of the tank by fitting the lower end. A seal cylinder portion 38 that seals the metering chamber 23 while supporting the guide bush 18 is formed at the center of the inner surface of the lower bottom 35.

  The tank 17 is supported by the flange portion 36 being engaged with the first step portion 29 of the housing, and the bottom portion 35 is engaged with the inner cylinder 28 of the housing to be locked to the housing 16. Then, the amount of one ejection is determined by the difference in volume between the time when the tank 17 is compressed and restored.

  As shown in FIG. 2c, the guide bush 18 has a cylindrical shape having a lower base 40 and an annular flange portion 41 at the upper end. The guide bush 18 is provided with a stem moving hole 42 through which the stem 19 can be moved up and down in the center of the lower base 40, and a communication hole 43 that connects the inside of the guide bush 18 and the metering chamber 23 on the side surface. Yes. Further, an engagement protrusion 44 that engages with the stem rubber is formed on the upper surface of the flange portion. A spring support portion 45 that supports the spring 20 is provided on the inner surface of the guide bush 18.

  The guide bush 18 is engaged with the flange portion 36 of the tank and the lower bottom 40 is engaged with the seal cylinder portion 38 of the tank and is locked to the tank 17. The spring 20 is supported, the stem 19 is guided, and when the tank 17 is compressed, the inner surface side is supported and the deformation amount is made constant.

Returning to FIG. 1, the stem 19 has a rod-like shape, the ejection hole 51 formed at the upper end, the stem hole 52 formed at the upper side surface, and the inside of the stem that connects the ejection hole 51 and the stem hole 52. And a passage 53. Further, the lower end 54 of the stem 19 is reduced in diameter so that it can be easily fitted into the seal hole 37 of the tank. Further, a step portion 55 that engages with the spring is formed on the outer periphery of the middle portion of the stem.
A conventionally known coil spring is used for the spring 20. The spring 20 is held between the spring support 45 of the guide bush and the stepped portion 55 of the stem, and always biases the stem 19 upward.

The stem rubber 21 has a ring shape into which the stem 19 is inserted so as to seal the outer peripheral surface of the stem with its inner diameter surface.
The stem rubber 21 is locked by engaging the outer peripheral edge of the stem rubber 21 with the second step portion 30 of the housing and the lower surface of the stem rubber 21 with the engaging protrusion 44 of the guide bush. The stem rubber 21 has an effect of sealing the outer peripheral surface of the stem while inserting and supporting the upper portion of the stem.

The valve cap 22 has a cylindrical shape with an upper bottom 57 having a central hole 56 through which the stem 19 passes.
The valve cap 22 is attached so as to cover the opening of the housing 16 and the pressure vessel 11 on the side surface so as to press the stem rubber 21 on the inner surface, and the lower end 58 of the side surface is caulked to the engagement recess 11a of the pressure vessel. By attaching, it is fixed to the pressure vessel 11.

  As the propellant A2 of the aerosol composition A, a compressed gas such as nitrogen, compressed air, carbon dioxide gas or nitrous oxide gas is used. The active ingredients contained in the stock solution A1 include those used for mucous membranes such as nasal drops, nasal rinses, ear drops, eye wash, etc. Those used for the skin are used.

In the manufacturing method of the aerosol product 10, the pressure vessel 11 filled with the stock solution A1 is covered with the valve 12 having the valve cap 22 attached thereto, and the lower end 58 of the valve cap is caulked into the engagement recess 11a of the pressure vessel. Next, the stem is half-actuated so that the lower end 54 of the stem is not engaged with the tank seal hole 37, and the compressed gas is filled from the gap between the outer periphery of the stem and the center hole 56 of the valve cap. The aerosol product 10 filled in this manner is filled with a propellant (gas) without a stock solution in the housing immediately after filling.
Here, after the aerosol product 10 is filled, the aerosol product is placed in hot water at about 50 ° C. to check for the presence of leakage of the propellant (warm water test). However, since the inside of the valve is filled with gas, the tank 17 of the valve molded by an elastic material such as silicone rubber or synthetic rubber is not easily deteriorated by heat from the hot water inspection.

  The aerosol product 10 is used by being inverted as shown in FIG. That is, the stock solution A1 is pressed by the propellant A2 by being inverted, and the metering chamber is passed through the introduction hole 27, the notch 31, the seal hole 37, the stem movement hole 47 of the guide bush, and the communication hole 43 of the guide bush. 23 and introduced into the entire valve 12.

As shown in FIG. 3, with the aerosol product 10 turned upside down, when the stem 19 is lowered with respect to the pressure vessel 11 (in FIG. 3, it is raised), the stem hole 52 communicates with the inside of the guide bush. The tank sealing hole 37 is sealed by the stem lower end 54. That is, the internal pressure of the tank 17 becomes the same as the outside air, and a difference can be made between the internal pressure of the pressure vessel 11.
Therefore, simultaneously with lowering the stem, the tank 17 is pressed and deformed in the direction of the guide bush 18 by the stock solution A1 between the tank 17 and the housing 16.

  Due to this deformation, the quantitative chamber 23 is crushed, and the stock solution is ejected by the amount of the quantitative chamber. At this time, the guide bush 18 supports the deformation of the tank 17. Therefore, when the stem 19 is returned to its original position, the tank 17 returns to its original shape, and the fixed-quantity chamber 23 having the same size is formed again.

  As described above, the aerosol product 10 cannot be continuously used in an upright state, and can inject the stock solution in a fixed amount in an inverted state.

  An injector 60 for storing an inverted aerosol product shown in FIG. 4 includes a cylindrical injector body 61, an injection nozzle 62 provided therein, and a cap 63 of the injector body. In FIG. 4, the aerosol product 10 of FIG. 1 is accommodated.

The injector body 61 includes a cylindrical portion 66, an upper bottom 67, and an injection port portion 68 that extends in the radial direction from the upper portion of the cylindrical portion 66. A rib 71 that supports the aerosol product 10 is formed on the inner surface of the cylindrical portion 66. A stepped portion 72 that engages with the injection nozzle 62 is formed on the inner surface of the upper bottom 67. The injection port portion 68 includes a cylindrical injection port portion main body 73 and a collar portion 74 extending upward from the tip thereof. Further, the ejection port portion 68 and the upper bottom 67 are continuous by a curved surface 75 that gently curves from the upper bottom 67 toward the ejection port portion 68. An inner surface engaging portion 69 that engages with the cap is formed on the inner surface of the lower end of the cylindrical portion.
A concave portion is formed by the jet port main body 73, the collar portion 74, and the curved surface 75, and this concave portion becomes the finger hook portion 76.

Such an injector body preferably has an outer diameter of the cylinder portion of 5 to 50 mm, particularly 10 to 40 mm. When the outer diameter of the tube portion is 5 to 50 mm, the spray direction of the aerosol composition can be easily specified by using the finger hook portion with a finger. When the outer diameter is larger than 50 mm, it is difficult to push the bottom of the pressure vessel. On the other hand, when the outer diameter is smaller than 5 mm, it is difficult to use the finger hooking part even if it is put on the finger.
Furthermore, in this embodiment, the length of the cylinder part is configured such that the lower end of the aerosol product protrudes from the lower end opening of the cylinder part. Thereby, it can be made to inject by pushing the lower end of an aerosol product with respect to an injector main part. However, the lower end of the aerosol product may not protrude from the lower end opening of the cylindrical portion. In this case, it can be injected by inserting a finger from the lower end opening of the cylinder and pushing the bottom of the aerosol product.

  The injection nozzle 62 includes a nozzle body 77 and a nozzle tip 78 attached to the nozzle body. The nozzle body 77 includes a stem engagement portion 79, an attachment portion 80 to which the nozzle tip is attached, and a passage 81 that communicates the stem engagement portion 79 and the attachment portion 80. The nozzle tip 78 is formed with an injection hole 82. By attaching the nozzle tip 78 to the nozzle body, an action of a mechanical breakup mechanism is obtained, and the stock solution is jetted in a mist form.

  The cap 63 has a cylindrical shape having a lower base 86, and an elastic member 87 such as a sponge is provided on the inner surface of the lower base. Further, an outer surface step portion 88 that engages with the inner surface engaging portion 69 of the injector main body 61 is formed at the upper end.

Such an injector 60 accommodates the aerosol product 10 by attaching the tip of the stem 19 of the aerosol product to the stem engaging portion 79 of the injection nozzle and attaching the cap 63 to the injector body 61. Then, the cap 63 is removed and used upside down (see FIG. 5).
FIG. 5 shows one method of using the injector 60. That is, when using it upside down, the direction of the injection port portion 68 can be adjusted by placing the thumb on the finger hook portion 76, and the injection direction of the stock solution can be easily specified. The finger hook is located between the center axis of the tube (stem) and the collar, and the side of the tube can be held by the middle finger while supporting the finger hook with the thumb. Even if is pressed, the injection direction hardly changes and the injection direction is stabilized. Furthermore, since the injection nozzle 62 is fixed, the aerosol product can be replaced and reused.

It is side surface sectional drawing which shows one Embodiment of the fixed-quantity injection type aerosol product for the inversion of this invention. 2a, b and c are side cross-sectional views showing the housing, tank and guide bushing of the aerosol product of FIG. It is a state figure when the stem of the aerosol product of FIG. 1 is lowered. It is a longitudinal cross-sectional view which shows one Embodiment of the injector which accommodated the aerosol product of this invention. FIG. 5 is a state diagram illustrating how the injector of FIG. 4 is used.

Explanation of symbols

A Aerosol Composition A1 Stock Solution A2 Propellant 10 Aerosol Product 11 Pressure-resistant Container 11a Engaging Recess 12 Valve 16 Housing 17 Tank 18 Guide Bush 19 Stem 20 Spring 21 Stem Rubber 22 Valve Cap 23 Metering Chamber 25 Bottom Bottom 26 Housing Flange portion 27 Introduction hole 28 Inner cylinder 29 First step portion 30 Second step portion 31 Notch portion 32 Projection portion 33 Gasket 35 Lower bottom of tank 36 Flange portion of tank 37 Seal hole 38 Seal cylinder portion 40 Lower bottom of guide bush 41 Flange portion of guide bush 42 Stem movement hole 43 Communication hole 44 Engagement projection 45 Spring support portion 51 Ejection hole 52 Stem hole 53 Stem inner passage 54 Lower end of stem 55 Step portion 56 Center hole 57 Upper bottom of valve cap 58 The lower end of the cap 60 The injector 61 The injector body 62 The injection nozzle 63 The cap 66 The cylindrical portion 67 The upper bottom 68 The injection port portion 69 The inner surface engagement portion 71 The rib 72 The step portion 73 The injection port portion main body 74 The collar portion 75 The curved surface 76 Finger Hanging portion 77 Nozzle body 78 Nozzle tip 79 Stem engagement portion 80 Mounting portion 81 Passage 82 Injection hole 86 Bottom bottom 87 Elastic member 88 External surface step portion

Claims (4)

A cylindrical housing having a lower bottom, which is inserted and fixed in an opening of a pressure-resistant container filled with compressed gas as a propellant , and a deformable, lower bottom which is inserted and fixed in the housing. A cylindrical tank having a bottom, a cylindrical guide bush having a lower bottom, and a stem having a stem hole, which is inserted into the center of the guide bush so as to be movable up and down; A space that is formed between the tank and the guide bush is provided with a spring that urges the stem upward and a ring-shaped stem rubber that blocks communication between the stem hole and the inside of the housing. A fixed-injection aerosol valve,
The housing has an introduction hole formed in a side surface;
An inner cylinder formed in the center of the bottom to support the tank;
A notch formed in a part of the upper end of the inner cylinder,
The tank seals the metering chamber while supporting the guide bush and a seal hole formed at the center of the bottom so as to seal the inside of the tank by inserting the lower end of the stem while communicating between the inside and outside of the tank. A seal cylinder formed on the periphery of the seal hole;
An inverted quantitative injection type aerosol valve having a stem moving hole formed at the center of the bottom so that the guide bush can freely move up and down, and a communication hole communicating the inside of the guide bush and the metering chamber. The housing has a first step formed on the inner surface upper portion and a second step formed on the first step.
The tank has a flange portion formed at the upper end so as to engage with the first step portion;
The guide bush has a flange portion formed at an upper end so as to be engaged with the first step portion via the flange portion of the tank;
The stem rubber is configured to engage with the second step portion and press the flange portion of the guide bush,
2. The inverted quantitative injection type aerosol valve according to claim 1, further comprising a valve cap attached to the pressure vessel so as to press the stem rubber against the second step portion and to cover the housing. . 2. The inverted quantitative injection type aerosol valve according to claim 1, wherein when the lower end of the stem is fitted into the seal hole of the tank, the peripheral edge of the seal hole seals the notch of the housing. Inverted consisting of a pressure-resistant container, a quantitative injection type aerosol valve according to claims 1 to 3 attached to an opening of the pressure-resistant container, and an aerosol composition comprising a stock solution and a propellant filled in the pressure-resistant container. Constant-injection aerosol products.